49999000000 has 98 divisors (see below), whose sum is σ = 124021850000. Its totient is φ = 19999200000.

The previous prime is 49998999997. The next prime is 49999000019. The reversal of 49999000000 is 99994.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 975001 + ... + 1024999.

Almost surely, 2^49999000000 is an apocalyptic number.

49999000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49999000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62010925000).

49999000000 is an abundant number, since it is smaller than the sum of its proper divisors (74022850000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49999000000 is an frugal number, since it uses more digits than its factorization.

49999000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50041 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

Adding to 49999000000 its reverse (99994), we get a palindrome (49999099994).

The spelling of 49999000000 in words is "forty-nine billion, nine hundred ninety-nine million", and thus it is an aban number.